Dietary lipids and intestinal lipid aggregates

Dietary lipids in the intestinal lumen, including triglycerides, cholesterol, and phospholipids, are essential macronutrients that must be processed for systemic absorption. This process involves emulsification by bile salts and hydrolysis by enzymes like pancreatic lipase to form mixed micelles, which then transport lipid monomers to the enterocyte surface (Hussain, 2014, PubMed). While these lipids are not a single protein target, they represent a critical physiological pathway for therapeutic intervention in metabolic diseases. Drugs such as Orlistat inhibit the lipase enzymes required for triglyceride breakdown, while Ezetimibe blocks the NPC1L1 transporter responsible for cholesterol uptake (Phan et al., 2012, PubMed). Additionally, bile acid sequestrants like Colesevelam disrupt the micellar solubilization of these lipids, promoting their excretion (StatPearls, 2023). Managing the absorption of these luminal lipid aggregates is a primary strategy for treating obesity and hyperlipidemia, though it can lead to side effects like steatorrhea and deficiencies in fat-soluble vitamins.

Other names

Intestinal lipidsDietary fatsMixed micellesLuminal lipid aggregatesIntestinal lipid pool

Inhibition of enzymatic hydrolysis, blockade of membrane transporters, and physical sequestration of lipids or bile acids to prevent intestinal absorption.